Up- and down-conversion luminescence in the oxyfluoride glass ceramics containing Ba_2+1.5xYb_1?xF₇:Tb³⁺ nanocrystals

详细信息    查看全文

• 作者：Fengxia Xin ; Shilong Zhao ; ^{shilong_zhao@hotmail.com} ; Guohua Jia ; Lihui Huang ; Degang Deng ; Huanping Wang ; Shiqing Xu ; ^{sxucjlu@hotmail.com}
• 关键词：Glasses ; Optical materials ; Crystallisation ; Optical properties
• 刊名：Materials Chemistry and Physics
• 出版年：2012
• 出版时间：15 November, 2012
• 年：2012
• 卷：137
• 期：1
• 页码：177-181
• 全文大小：865 K

文摘

Transparent oxyfluoride borosilicate glass ceramics containing Ba_2+1.5xYb_1?xF₇:Tb³⁺ nanocrystals were successfully prepared by a melt-quenching method with subsequent heat treatment. The precipitated crystalline phase in the glass matrix changed gradually from BaF₂ to Ba_2+1.5xYb_1?xF₇ with the increase of YbF₃ content, which was confirmed by the results of XRD, HRTEM and EDX measurements. The ultraviolet and visible up-conversion and near-infrared quantum cutting down-conversion emissions were observed and interpreted. These materials could be used to modify the solar spectrum and enhance the silicon solar cell efficiency by the up-conversion and down-conversion luminescence of Tb³⁺-Yb³⁺ couples in the oxyfluoride borosilicate glass ceramics.